Lock



Feb. '25, 1930.

M. DERMODY LOCK Filed Jan. 20. 1928 INVENTOR 0 m Y m m m T M m wlmEssEs Patented Feb;- 25,1930 I Application fired; Ja uary-2o, F1928; is'eriai :No 248,207 .1

of' theinv'ention is to provide alocking mech- 5 41:5 anism including a chain-operated bolt," and key cntro1led;mea ns accessible from the out side'o'f the door for drawing the' chain to lift therboltgi' i V "By virtueof this 'arra'ngement; I provide rm alock which ise'x'ceedingly difficult to'jimmy,

which is too massive to f orce',-= and'yet which is extremely simple-inconstruction and operation. r I Moregeneral objects of the'invention are to providea lock of'simple, practical construe v tion, which will. be-rugged, durable and efficient in use, and well suited to the requirements of economical m'anufactu're and convenient installation. .Y Y

With the above noted and other objects in view, the invention consists in certain novel features of constructions and; combinations and arrangements of partsas will be more fully hereinafter setforth and" pointed out in the claims. The inventionmay be more fully understood from the following description in connection withthe accompanying drawings, wherein- Y Fig. 1 is a broken elevational view ofthef to inside. of a door equippedwith my improved lock, the dotted linesindicating theposition of the bolt when the latter has been moved to inoperative position by the chain. Fig. 2 is a sectional detail on'the line 2-2 ofFigl.

line 33 of Fig. 1.

mechanism, the' dotted lines indicating the position of the removable element of said mechanism when it has been pulled outwardly to lift the bolt. i

Fig. 5 is an enlarged end elevation of the inner end ofthe key controlled vmechar'iism, the dotted lines indicating the positionof the cylinder cross head when the door is locked.

In the drawings I have usedthe reference numeral to indicate a door hinged at 11 to Fig. 3 is a vertical sectional detail on tne c through the key controlle'dchain operating andiadapted Oppositetjamb;13.; .t 1 it: 1 7 is diate' itsviends on ai'fulcrum pin- 15, thi;s pin beingpreferably arranged,betweenthe cen: 55 I ter of the door and the hinged edge thereof.

Strapsfiorrbrackets :16] and 17 "secured to {the door adjacent the respective edges L thereof serve to guide "the rocking; movement of-the boltl-tjand strap: 16 is, preferably disposed .59

above the bolt so that theinormallposition of the latter is-as seen,infFig. 1; that is .to say, slightly ,inc'lined whereby a comparative slight rocking. OfthG boltwilljserve' todisen gage its ends from-the, keeper bracketssll) v and. 20garrangedt on the respective .Vj ambs 13 position with itsitwo ends enga'ged, in the keeper brackets-19and 20, whereby the. door 1 is effectively: secured-by the relatively-massive locking bolt; the inwardly extending ex? tensions- 12*- }0f: the door 'ambs; (see ig'."2)' preventing theinsertion' of a holt-rockingtool between either'sideof the door and jamb q'; V

' .jfllhe'a longer end,oif=;.thebo1t; that; is to say, I the upper end. thereof, which engagesgin the keeper "1-9-,"-:ifs; provided with a; spin or other.

flexible device, such, as the" chain. 22- is at tached. The other jend-kofithis chain is at tachedtoa keycontrolledmembersuch aspthe cylindrical block23 arranged in aicylindrical sleeve24= key6d at 24*v in the ,door. andadapted to be bodily withdrawn todr aw the chain andirock; the ;,b 1t@tofl disengage d position; In safer a t e k y ontroll d. me ha m is coIi(ferned ,"v it will be obvious, that such c'mefihanism lmay assume multiplicity? of practical; forms. .For illustrativ'e purposes however; I have shown one extremely simple mechanism consisting of "the sleeve 24 and the cylindrical block 23, the latter bein'gheld against inward movement beyond (the position of Fig-K4 by a cap 25 incllilding: a flange 26 screwed "on to the inner threaded end: .of the shell 24. Block"'23isiadditiona1ly pro} vided with-a flange 27: at1its outer-end abutfting 'a shoulder. 28 defined by an annfular; re

be disengaged by the ap lication of a suitable key in the outer end of the spindle. The

inner end of the spindle carries a detachable cross head 31 normallyxengage'able with the cap 25 to prevent outward withdrawal of the block 23, but'adaptedl when the spindle is rotated to the position illustrated in Figs1j4; and-5 1 6 pass-throughan'elongated slot 32 in cap 25jand permit'withdrawal of the block usin'g'the key as'a handle 'to'eiiect such with drawal. p

Axi l movement of the spindle Within'the block- 23*ma'y'be prevented by 'a'set screw 33 whirling in an I arcu'ate' groove- 34' in the spindle.- The se't'screw and groove also serve to 'limit the rotation of the spindle under the influence" of the key, serving as a "stop which will notify the operator of the key that the cross head 31 has'been moved to the proper position for withdrawingthe block. 7 v

1 Theeperatienof the device ,i's' as fellows. Assuming the parts to be in the locked 'posi tion ef Fig. 1, a' key is" inserted inthe spindle 29 from the outside of the:- door, and'the spindle is A rotated until checked by the set serewes, at'whieh time, head 31 will be in alignment with slot 32am the block 23flmay be drawn outwardly from the sleevefor shell 24,-drawing withit the ehain=22 androcki ng the bolt 14 to the 'detted line released o sition of Fig.1, The cylindrical block-23 is then bodily replaced in the shell and part2}! turned by the" key so that block 23 is held against dut ward movem ntnntile key is again apphea; The tapered key 23 assistsin and a normally slack bolt-operati'ng'flexible device attached tosaid member.

2. A door lock including abolt and a keeper, a bolt-operating handle member, a casing for the handle and key controlled means normally preventing withdrawal of the handle from the casing and means connecting the bolt .and'the handle to .permit Withdrawal of the bolt by power manually applied at the handle when the latter is released from'its casing, said connecting means comprising a flexible device normally slack when the handle is in its casing and adapted guiding- -the bliick back into proper position.

Theb'olt mayor course be readily manipulated by head frozhtheinsideof the door.

. Obviously,"'variousehanges and alterations might be made in the general form and arrange'ment of the parts described without departing from'th'e' inyerition. Hence I do not wish toil imit myself to'the details set forth,

within the spirit and scope offthe appended claims-.- Q

' l claimz' r V 1.- A door' lock including-a bolt ro'ekably mounted intermediate its=ends on the inner face o'f -a door, keeper means on the door jambs receivi'ng the'e'n'dsof the bolt, and key controlled means 'for rocking the bolt, ineluding a removable" key co'ntrolled member but shall consider myselfatdibert'yto-make such changes and alterations as fairly fall 

